My name is ***** ***** I will be helping you out today with your appliance repair. We are on an honor system here and are only paid for our services once we are rated so please don't hesitate to rate me. I will continue to help you through your appliance repair even after you rate me. Thank you.

I'm not sure what you sent me. Is that voltage you are referring to (11 - 22 VAC, VDC, Ohms)?So far:Door seals good.Door damper open (no blockage) and resistance value of motors (both windings) good compared to new damper.All 4 thermistors good resistance compared to temp/resistance chart.Defrost circuit measures 38.6 Ohms – Blue connector unplugged (J9 on connector) to J7 pin 9.Evaporator fan is operating but eventually ices up.Motherboard replaced 5 days ago and symptoms return. Appears evaporator is icing up (defrost problem) and not allowing airflow across it.

GE Refrigerator Defrost Thermostat WR50X10035RepairClinic Item #946924‹›Grid is 1 inch square$73.20Have you tested this part. This is the defrost thermostat. Any refrigerator that has a defrost issue I always replace this part.

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Customer reply replied 7 months ago

Have not. Will have to gain access to it by removing ceiling and Styrofoam. Just a switch...opens at 60 and closes at 45. Right?

A common problem is the sensor attached to the evaporator coil. The mother board initiates defrosts , but the sensor terminates it and the sensor can fail and either terminate defrost too quickly or not let it defrost at all. Replace that sensor.

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Customer reply replied 7 months ago

Hi Tom. I've decided since I have everything apart, I changed the evaporator defrost heater, spliced in a new evaporator thermistor and am waiting for the evaporator thermodisc (as you mentioned above) to arrive even though they all tested good. I have nothing to lose but $$. I'll let you know tomorrow night when I plug it pack in. But it usually takes a couple of days before the fresh food side starts warming up due to the restricted airflow across the evaporator.

Hi Tom.Well after replacing the evaporator defrost heater, evaporator thermister and evaporator thermodisc, and waiting one week now, I can say that it is working again. I don't know which part failed but I'm glad its all back together and functioning normal.Thanks for your suggestion but I was already on that road. Too bad I didn't get you first since Billy couldn't read my troubleshooting steps.Thanks again.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.